from __future__ import annotations

import json
import os
from pathlib import Path


def get_plugin_root() -> Path:
    return Path(__file__).resolve().parents[1]


def get_default_config_path() -> Path:
    return get_plugin_root() / "config.json"


def load_config(config_path: str | Path | None = None) -> dict:
    path = Path(config_path) if config_path is not None else get_default_config_path()
    if not path.exists():
        return {}
    with path.open("r", encoding="utf-8") as handle:
        data = json.load(handle)
    return data if isinstance(data, dict) else {}


def resolve_api_key(input_api_key: str | None, config_path: str | Path | None = None) -> str:
    if input_api_key and input_api_key.strip():
        return input_api_key.strip()

    env_api_key = os.getenv("KIE_API_KEY", "").strip()
    if env_api_key:
        return env_api_key

    config_api_key = str(load_config(config_path).get("api_key", "")).strip()
    if config_api_key:
        return config_api_key

    raise ValueError(
        "Kie API key is required. Provide api_key on the node, set KIE_API_KEY, or add api_key to config.json."
    )